Joost 't Hart wrote: > Joost 't Hart wrote: > >> Hi! >> >> I have been looking more specifically at what the (UCI) engine does to >> memory consumption. >> >> I start Scid. It does some preloading of stuff, I hit OK at the startup >> window and let the clipbase and new empty game come up. >> >> At the end of the scid_InitTclTk() in tkscid.ccp, Scid has eaten >> 23706940 bytes from the heap. >> >> Now I start the engine, let it spend its efforts on the start position >> in the game, in single variation mode. >> >> Each time the engine presents a new line, Game::Decode() is called >> several times allocating some more memory, and giving me the opportunity >> to drop some heap statistics in the console. >> >> By the time Game::Decode is called for the first time, Scid eats >> 26077955 bytes. So after the init function some extra 3 MB has been >> consumed. Never mind, the very end of initialization must be somewhere else. >> >> Impossible for me to understand is that Scid eats more and more memory >> with each line (I think even with each move in each line) the engine >> presents: By the time the engine suggests 1.e4 c5 at depth 15 (after >> some 5.4 seconds), memory consumption has gone up to 28807555 (!). >> >> What useful things could Scid possibly do with those costly 2MB? >> >> > > Needless to add that this continues all the time. When I stop the engine > and restart it, by the time it arrives at depth 15 again, memory > consumption has gone up to 31081875. > > ... >
Got it! It is the recently added undo functionality which leaks all the memory in this case. Numerous occurrences of sc_game_save_for_undo() are there, creating new Game objects all the time. A corresponding reset does not occur... Why are "undo" operations required in the first place for all these engine thoughts? My recommendation is to reconsider (adding) this undo stuff. Thanks, Joost. > >> Cheers, >> Joost. >> >> >> > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Scid-users mailing list > Scid-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scid-users > > ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Scid-users mailing list Scid-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scid-users
